"text filter"

helen

could somebody give me a help regarding text filter. Here is my data loaded in RapidMiner.

key           description
1               loan to help me to start up a new company
2               loan to help to make a new hous
3               loan to help me to pay down credit card debt
4               loan to help me to pay down credit card debt
.                 .................
.                 ................
25             loan to help me to pay down credit card debt
.                 ...................
n               ..................

I'd like to use attibute filter to get the data which match in the description "credit card".  As result sould show me like below:
key           description
3               loan to help me to pay down credit card debt
4               loan to help me to pay down credit card debt
25             loan to help me to pay down credit card debt

should I uese the attribute filter in the preprocessing operater on Root Process? and which category should I chose in the condition_class? should I type "credit card" in the fild of parameter_sting?

many thinks in advance.

land

Hi,
if I understood you correctly, then you want to filter your examples (=rows) and not the attributes (=columns). Hence you would need the example filter.

Here's an example:

<operator name="Root" class="Process" expanded="yes">
    <operator name="ExampleFilter" class="ExampleFilter">
        <parameter key="condition_class"	value="attribute_value_filter"/>
        <parameter key="parameter_string"	value="description=.*credit card.*"/>
    </operator>
</operator>

If you need help on regular expressions, you could take a look in the tutorial or just use google.

Greetings,
  Sebastian